102 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



5. Agropyron subsecundum (Link) Hitchc, Amer. Jour. Bot. 21: 



131. 1934. 



Triticum subsecundum Link, Hort. Berol. 2: 190. 1833. 



San Francisco Peaks (Coconino County), 7,000 feet, moist mead- 

 ows and open woods. Newfoundland to Alaska, south to West 

 Virginia, Missouri, Arizona, and California. 



6. Agropyron scribneri Vasey, Torrey Bot. Club Bui. 10: 128. 



1893. 

 San Francisco Peaks (Coconino County), alpine slopes, July to 

 September. Montana and Idaho to New Mexico and Arizona. 



7. Agropyron saxicola (Scribn. and Smith) Piper, Contrib. U. S. Natl. 



Herbarium 11: 148. 1906. 



Elymus saxicola Scribn. and Smith, U„ S. Dept. Agr., Div. 

 Agrost. Bui. 11: 56. 1898. 



Low, open ground near Prescott, Yavapai County (Hitchcock 13195). 

 South Dakota to Washington, south to Arizona and California. 



8. Agropyron spicatum (Pursh) Scribn. and Smith, XL S. Dept. Agr., 



Div. Agrost. Bui. 4: 33. 1897. 



Festuca spicata Pursh, Fl. Amer. Sept. 1: 83. 1814. 



Cochise County, in the Chiricahua Mountains, 7,500 feet (Blumer 

 1495), also in the Huachuca Mountains (Peebles et al. 3421), rocky 

 slopes, plains, and dry open woods, June to October. Michigan to 

 Alaska, south to New Mexico, Arizona, and California. 



9. Agropyron arizonicum Scribn. and Smith, U. S. Dept. Agr., Div. 



Agrost. Bui. 4: 27. 1897. 

 Cochise, Santa Cruz, and Pima Counties, 5,000 to"8,000 feet, rocky 

 slopes, late July to October, type from the Rincon Mountains 

 (Nealley 67). Western Texas to Nevada, Arizona, California, and 

 Chihuahua. 



20. ELYMUS. Wild-rye 



Cespitose or rhizomatous perennials, with usually broad, flat leaf 

 blades and slender or sometimes dense spikes; spikelets 2- to 6- 

 flowered, more or less dorsi-ventral to the axis; glumes equal, firm or 

 indurate, somewhat asymmetric; lemmas rounded on the back, awn- 

 less or awned from the tip. 



These grasses are utilized as forage mainly before maturity, when 

 they become too coarse. Mammoth wild-rye (E. giganteus) is culti- 

 vated occasionally for ornament. 



Key to the species 



1. Plants with slender creeping rhizomes; spikelets often solitary, rather irregu- 

 larly placed on the axis 1. E. triticoides. 



1. Plants without creeping rhizomes, or these short and stout in E. condensatus 

 (2). 

 2. Spikelets awnless; glumes narrow or subulate, obscurely nerved, not broad- 

 ened above the base (3). 

 3. Spikes large, thick, often compound; spikelets 2 to 4 at each node; culms 



usually tall and stout 2. E. condensatus. 



3. Spikes narrow, slender, loosely flowered; most of the spikelets solitary; 

 culms relatively slender 3. E. salina. 



